Scientists may have learned how to identify the unique sounds made by bubbles forming inside drought-stressed trees.
When drought hits, trees can suffer—a process that makes sounds. Now, scientists may have found the key to understanding these cries for help.In the lab, a team of French scientists has captured the ultrasonic noise made by bubbles forming inside water-stressed trees. Because trees also make noises that aren't related to drought impacts, scientists hadn't before been able to discern which sounds are most worrisome.
(Watch a video: Drought 101.)
"With this experiment we start to understand the origin of acoustic events in trees," said Alexandre Ponomarenko, a physicist at Grenoble University in France, whose team conducted the research.
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